body{
  background-image: url('../images/index-background.png');
  background-repeat: no-repeat;
  background-size: cover;
  background-position-y: 15%;
}
.wel-main {
  font-size: 72px;
  font-family: "FangSong";
  font-weight: bolder;
  margin-top: 20%;
  text-align: center;
  background: -webkit-linear-gradient(top, red, green);
  background-clip: text;
  -webkit-text-fill-color: transparent;
}
